关于C#：从处理到Arduino的发送字符串不起作用

Sending String from Processing to Arduino Not Working

我在处理中收集了一些字符串信息，并尝试将其发送给Arduino。我正在处理发送信息，但是，我在arduino中的输出很奇怪。我得到类似" 77789 ..."的数字。我不确定自己在做什么错。我需要做的是，基本上是从处理中获取一个字符串，并将其发送到arduino以在LCD屏幕上显示。

任何帮助，将不胜感激。

这是我的处理代码：

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import processing.serial.*;

Serial myPort;

XML MSFTxml; // loading Query

XML MSFT; // results of the query
XML row; // first row in the query

XML symbol; // Name of the stock
String symbolTxt;

String val;

void setup() {
size(200,200);
myPort = new Serial(this,"COM3", 9600);

}

void draw() {

updateXMLCall();

delay(10000);
}
void updateXMLCall () {

MSFTxml = loadXML("https://query.yahooapis.com/v1/public/yql?q=select%20*%20from%20csv%20where%20url%3D%27http%3A%2F%2Fdownload.finance.yahoo.com%2Fd%2Fquotes.csv%3Fs%3DMSFT%26f%3Dsl1d1t1c1ohgv%26e%3D.csv%27%20and%20columns%3D%27symbol%2Cprice%2Cdate%2Ctime%2Cchange%2Ccol1%2Chigh%2Clow%2Ccol2%27&format=xml&env=store%3A%2F%2Fdatatables.org%2Falltableswithkeys");
MSFT = MSFTxml.getChild("results"); //Getting the first tag"results" in the query MSFT
row= MSFT.getChild("row"); //first child tag"row"
symbol = row.getChild("symbol"); //name of the stock
symbolTxt = symbol.getContent().toString(); //converting the name of the stock into a string
myPort.write(symbolTxt);
println(symbolTxt);
}

这是我的arduino代码：

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#include <Wire.h>
#include"rgb_lcd.h"
rgb_lcd lcd;

const int colorR = 50;
const int colorG = 0;
const int colorB = 0;

void setup()
{
Serial.begin(9600);
// set up the LCD's number of columns and rows:
lcd.begin(16, 2);
lcd.setRGB(colorR, colorG, colorB);
// Print a message to the LCD.
lcd.setCursor(0, 1);
}

void loop()
{
String content ="";
if (Serial.available()) {
while (Serial.available()) {
content += Serial.read();
lcd.print(content);
Serial.print(content);
lcd.setCursor(0, 1);
}
}
delay(100);
}